CN206943163U - A kind of ladder locating pin structure - Google Patents

Abstract

The utility model provides a kind of ladder locating pin structure, belongs to component of machine technical field.It, which solves existing ladder locating pin structure, can not separate the technical problems such as adjustment position.This ladder locating pin structure includes cylindrical pin one and cylindrical pin two, the diameter of pin one is more than the diameter of pin two, one end of pin two offers the hollow recess by end face axially inward, the other end of pin two offers the through hole through end face and hollow recess bottom land, through hole can be passed through and be screwed onto the bolt of pin one end by being provided with hollow recess, and the diameter of through hole is more than the shank diameter of bolt and less than the cap body diameter of bolt.When being positioned using the ladder locating pin structure in the technical program to different parts, different parts can be realized with individually adjustment.

Description

A stepped positioning pin structure

technical field

The utility model belongs to the technical field of mechanical parts and relates to a positioning pin, in particular to a stepped positioning pin structure.

Background technique

The locating pin is a part that participates in limiting the degree of freedom of the locating part. It is widely used in various industrial productions. It is widely used in the combined assembly or performance testing of automobiles. The stepped locating pin is a kind of locating pin. It has two types. Or two or more positioning parts with different diameters, so that multiple components with different apertures can be positioned at the same time. Locating pins, currently the stepped locating pins on the market cannot make relative adjustments to the positioning parts of different diameters. When the position needs to be adjusted, the above-mentioned side panel and reinforcement plate must be adjusted at the same time, and the hole position needs to be modified by the mold, which is expensive and takes a long time. , and there will be repeated hole changes.

Chinese patent (notification number: CN201714769U, publication date: 2011-01-19) discloses a stepped positioning pin, including a positioning pin body, the front end of the positioning pin body is conical, the rear part is provided with a nut, and in front of the nut Gaskets are arranged on the positioning pin body; a boss is provided around the positioning pin body at the middle part of the positioning pin body. After the positioning pin is equipped with a boss, the diameter of the middle part of the positioning pin body is increased, thereby increasing the strength, reinforcing the pin body, and effectively preventing the positioning pin body from being broken after being subjected to long-term force, thereby prolonging the service life and reducing the use cost. . When the diameter of the positioning pin body is less than 14mm and the length is greater than the specified limit, the boss can be added to increase the diameter of the middle part.

The stepped positioning pins in the above patent documents can only adjust the relative positions of the positioning parts with different diameters in the axial direction, which is not convenient enough in use.

Contents of the invention

The utility model aims at the above-mentioned problems existing in the existing technology, and provides a stepped positioning pin structure. The technical problem to be solved by the utility model is: how to improve the adjustability of the stepped positioning pin structure.

The purpose of this utility model can be achieved through the following technical solutions:

A stepped positioning pin structure, comprising a cylindrical pin 1 and a cylindrical pin 2, the diameter of the pin 1 is larger than the diameter of the pin 2, characterized in that the pin 2 One end is provided with a hollow groove axially inward from the end surface, and the other end of the pin 2 is provided with a through hole passing through the end surface and the bottom of the hollow groove, and the hollow groove is provided with a The through hole is screwed to a bolt at one end of the pin, and the diameter of the through hole is larger than the diameter of the shaft of the bolt and smaller than the diameter of the cap of the bolt.

Its working principle is as follows: In this technical solution, a stepped positioning pin structure is formed by pins 1 and 2 of different diameters, and one end of pin 2 is connected to the end of pin 1 by bolts. The cap body of the bolt is located in the hollow groove of the pin two, the rod body of the bolt passes through the screw hole and is screwed into the threaded hole at the end of the pin, and the bottom of the hollow groove is squeezed by the cap body of the screw so that the pin two The end is tightly abutted against the end of pin one, so that both pin one and pin two can be fixed firmly. When adjusting the relative position of pin 1 and pin 2, the above-mentioned bolts are loosened. Since the diameter of the through hole is greater than the diameter of the shank of the bolt, there is a certain adjustment margin between the inner wall of the through hole and the outer peripheral surface of the shank of the bolt. At this time, the position of pin 2 can be adjusted radially as required, and then the bolts can be locked to achieve the purpose of adjusting the relative position of pin 1 and pin 2.

When different components are positioned by using the stepped positioning pin structure in the technical solution, the different components can be individually adjusted.

In the above-mentioned stepped positioning pin structure, the radius difference between the first pin and the second pin is a, and when the bolt is arranged coaxially with the through hole, the outer peripheral surface of the shank of the bolt and the through hole The distance between the inner walls is b, where a>b. In this way, when the stepped positioning pin structure is used, it can avoid that the envelope of the pin 2 exceeds the envelope of the pin 1 after the pin 2 is adjusted to the extreme value, resulting in scratching when the positioned parts are taken out.

In the above stepped positioning pin structure, the size of b above is 1.4mm˜1.8mm. Preferably, the size of b is 1.6 mm, that is, the relative adjustment amount of the first pin and the second pin is 1.6 mm on one side, and the radial relative position of the two can be adjusted within a range of 0 mm to 3.2 mm, which can meet the requirements.

In the above-mentioned stepped positioning pin structure, one end connected to the pin two is the rear end, and the other end is the front end, and the front end of the pin two is also provided with a guide cone, and the guide cone One end is detachably connected to the pin two, and the other end of the guide cone has a conical guide surface on the outer peripheral surface. The guide cone acts as a guide, facilitating the insertion of the stepped positioning pin structure into the positioning hole of the component with positioning.

In the above-mentioned stepped positioning pin structure, one end of the guide cone with a conical guide surface is a tip, and the other end is a connecting end, and the connecting end of the guide cone has a cylindrical connecting portion and the connecting portion is inserted into Set in the hollow groove, the outer peripheral surface of the pin 2 is provided with a threaded through hole along the radial direction of the pin 2, the threaded through hole is screwed with a top wire and the end of the top wire It can abut against the outer peripheral surface of the connecting part. When adjusting the relative position of pin 1 and pin 2, first loosen the top screw, remove the guide head, then loosen the bolts, put on the adjustment tool, put in the adjustment shim, and increase the shim by increasing the other side Adjust the position of the pin 2 by using the above method, tighten the bolts after the adjustment is in place, remove the tooling and gasket, install the guide head and lock the top screw to complete the entire adjustment process.

In the above-mentioned stepped positioning pin structure, as another solution, one end of the guide cone with a conical guide surface is a tip, and the other end is a connecting end, and the connecting end of the guide cone has a cylindrical connecting portion , the inner side wall of the hollow groove is a circumferential surface, the inner side wall of the hollow groove has an internal thread, and the outer peripheral surface of the connecting part has an external thread matched with the internal thread. In this way, the detachable connection between the guide cone and the pin two can also be realized, and the connection is firm and easy to disassemble.

In the above stepped positioning pin structure, both the rear end surface of the pin two and the end surface of the pin one have uneven friction layers. After the contact surface of pin one and pin two increases friction force like this, can make pin one and pin two connect more firmly.

The bolts in this technical solution are preferably hexagon socket bolts.

Compared with the prior art, the pin two in the utility model is connected with the pin one through the through hole through the bolt. Since the diameter of the through hole is greater than the diameter of the rod body of the bolt, the distance between the inner wall of the through hole and the outer peripheral surface of the bolt rod is There is a certain adjustment margin between them, the position of pin 2 can be adjusted radially as required, and then the bolts can be locked to achieve the purpose of adjusting the relative position of pin 1 and pin 2; using the ladder positioning in this technical solution When the pin structure is used to position different parts, different parts can be individually adjusted.

Description of drawings

Fig. 1 is a structural schematic view of the ladder positioning pin structure when it is installed and used.

FIG. 2 is a schematic diagram of a partially enlarged structure at point A in FIG. 1 .

Fig. 3 is a schematic cross-sectional structure diagram of the stepped positioning pin structure.

Fig. 4 is a schematic diagram of the structure when the first pin and the second pin are separated in the stepped positioning pin structure.

Fig. 5 is a three-dimensional structural schematic view of the stepped positioning pin structure adjustment.

In the figure, 1, pin one; 11, threaded hole; 2, pin two; 21, hollow groove; 22, through hole; 23, front end; 24, rear end; 25, threaded through hole; 3, bolt; 31, rod body; 32, cap body; 4, guide cone; 41, tip; 42, connecting end; 43, conical guiding surface; 44, connecting part; 5, friction layer; 6, top wire; 7, tooling; 8 , Gasket.

detailed description

The following are specific embodiments of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model is not limited to these embodiments.

Embodiment one

As shown in Figures 1 to 5, the ladder positioning pin structure includes a cylindrical pin one 1 and a cylindrical pin two 2, the diameter of the pin one 1 is greater than the diameter of the pin two 2, and the pin two One end of the pin 2 is provided with a hollow groove 21 axially inward from the end surface, and the other end of the pin 2 is provided with a through hole 22 that runs through the end surface and the bottom of the hollow groove 21, and the hollow groove 21 is provided with a hole that can pass through Through the through hole 22 and screwed on the bolt 3 at the end of the pin one 1, the bolt 3 includes a cap body 32 and a rod body 31, the diameter of the through hole 22 is greater than the diameter of the rod body 31 of the bolt 3 and smaller than the diameter of the cap body 32 of the bolt 3; One end of the pin two 2 is connected to the end of the pin one 1 by the bolt 3, the cap body 32 of the bolt 3 is positioned in the hollow groove 21 of the pin two 2, and the rod body 31 of the bolt 3 passes through the screw hole and is screwed on the pin In the threaded hole 11 at the end of the sub-1, the bottom of the hollow groove 21 is extruded by the cap body 32 of the screw so that the end of the pin two 2 and the end of the pin-1 are tightly abutted against, so that the pin can be Both son one 1 and pin two 2 are fixed firmly. When the relative position of pin one 1 and pin two 2 is adjusted, the above-mentioned bolt 3 is loosened, because the diameter of through hole 22 is greater than the diameter of shank 31 of bolt 3, the inwall of through hole 22 and the outer periphery of shank 31 of bolt 3 There is a certain adjustment margin between the surfaces. At this time, the position of pin 2 2 can be adjusted radially as required, and then the bolt 3 is locked to achieve the purpose of adjusting the relative position of pin 1 and pin 2; When different components are positioned by using the stepped positioning pin structure in this embodiment, different components can be individually adjusted.

As shown in Figure 3, the radius difference between pin one 1 and pin two 2 is a, when the bolt 3 is coaxially arranged with the through hole 22, the distance between the outer peripheral surface of the rod body 31 of the bolt 3 and the inner wall of the through hole 22 is b, where a>b; in this way, when using this stepped positioning pin structure, it can prevent the envelope of pin 2 2 from exceeding the envelope of pin 1 after pin 2 2 is adjusted to the extreme value, resulting in Scraping holes occur when positioning parts; further, the size of b is 1.4mm to 1.8mm. Preferably, the size of b is 1.6 mm, that is, the relative adjustment amount of pin one 1 and pin two 2 is 1.6 mm on one side, and the radial relative position of the two can be adjusted within a range of 0 mm to 3.2 mm, so as to satisfy need.

As shown in Fig. 2 and Fig. 3, one end that pin two 2 is connected with pin one 1 is rear end 24, and the other end is front end 23, and the front end 23 of pin two 2 is also provided with guide cone 4, guide cone One end of 4 is detachably connected with pin two 2, and the outer peripheral surface of the other end of the guide cone 4 is a conical guide surface 43; the end of the guide cone 4 with the conical guide surface 43 is a tip 41, and the other end is a connecting end 42, and the guide cone 4 has a conical guide surface 43. The connecting end 42 of the cone 4 has a cylindrical connecting portion 44 and the connecting portion 44 is inserted in the hollow groove 21, and the outer peripheral surface of the pin 2 is provided with a threaded through hole 25 along the radial direction of the pin 2 , the threaded through hole 25 is screwed with the top screw 6 and the end of the top screw 6 can abut against the outer peripheral surface of the connecting portion 44 . The guide cone 4 plays a guiding role, which facilitates the insertion of the stepped positioning pin structure into the positioning hole of the component with positioning. When adjusting the relative position of pin one 1 and pin two 2, loosen the top screw first. 6. Remove the guide cone 4, loosen the bolt 3, put on the adjustment tool, put in the adjustment gasket 8, and adjust the position of the pin 2 by increasing the gasket 8 on one side and decreasing the gasket on the other side, and adjust it in place Finally tighten the bolt 3, take off the tooling and gasket 8, install the guide cone 4 and lock the top screw 6, and complete the whole adjustment process.

As shown in Figure 4, both the end surface of the rear end 24 of the pin two 2 and the end surface of the pin one 1 have an uneven friction layer 5, so that after the friction force is increased on the contact surface of the pin one 1 and the pin two 2 , can make the connection between pin one 1 and pin two 2 more firm.

Embodiment two

This embodiment is substantially the same as Embodiment 1, the difference is that the inner wall of the hollow groove 21 in this embodiment is a circumferential surface, the inner wall of the hollow groove 21 has an internal thread, and the connecting portion 44 of the guide cone 4 The outer peripheral surface has an external thread matched with the internal thread, so that the detachable connection between the guide cone 4 and the pin two 2 can also be realized, and the connection is firm and easy to disassemble.

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range.

Although this article uses more 1, pin one; 11, threaded hole; 2, pin two; 21, hollow groove; 22, through hole; 23, front end; 24, rear end; 25, threaded through hole; 3, bolt; 31, rod body; 32, cap body; 4, guide cone; 41, tip; 42, connection end; 43, conical guide surface; 44, connection part; 5, friction layer; 6, top wire; 7 , Tooling; 8, Gasket and other terms, but does not rule out the possibility of using other terms. These terms are only used to describe and explain the essence of the utility model more conveniently; interpreting them as any kind of additional limitation is contrary to the spirit of the utility model.

Claims (7)

1. A stepped positioning pin structure, comprising a cylindrical pin one (1) and a cylindrical pin two (2), the diameter of the pin one (1) is greater than that of the pin two (2) ), it is characterized in that one end of the pin two (2) is provided with a hollow groove (21) axially inward from the end face, and the other end of the pin two (2) is provided with a through end face With the through hole (22) at the bottom of the hollow groove (21), the hollow groove (21) is provided with the through hole (22) that can pass through and be screwed on the pin one (1 ) end of the bolt (3), the diameter of the through hole (22) is larger than the diameter of the rod body (31) of the bolt (3) and smaller than the diameter of the cap body (32) of the bolt (3). 2. The stepped positioning pin structure according to claim 1, characterized in that, the radius difference between the first pin (1) and the second pin (2) is a, when the bolt (3) is connected to the through When the holes (22) are arranged coaxially, the distance between the outer peripheral surface of the rod body (31) of the bolt (3) and the inner wall of the through hole (22) is b, wherein a>b. 3. The stepped positioning pin structure according to claim 2, characterized in that, the size of b is 1.4mm-1.8mm. 4. The ladder positioning pin structure according to claim 1, 2 or 3, characterized in that, the end connected to pin two (2) and pin one (1) is the rear end (24), and the other end is The front end (23), the front end (23) of the pin two (2) is also provided with a guide cone (4), and one end of the guide cone (4) is detachably connected to the pin two (2) , the other end of the guide cone (4) has a conical guide surface (43) on the outer peripheral surface. 5. The stepped positioning pin structure according to claim 4, characterized in that, one end of the guide cone (4) having a conical guide surface (43) is a tip (41), and the other end is a connecting end (42), The connection end (42) of the guide cone (4) has a cylindrical connection part (44) and the connection part (44) is inserted in the hollow groove (21), and the pin two (2) is provided with a threaded through hole (25) along the radial direction of the pin two (2) on the outer peripheral surface, and the threaded through hole (25) is internally screwed with a jackscrew (6) and the jackscrew (6) ) can abut against the outer peripheral surface of the connecting portion (44). 6. The stepped positioning pin structure according to claim 4, characterized in that, one end of the guide cone (4) having a conical guide surface (43) is a tip (41), and the other end is a connecting end (42), The connecting end (42) of the guide cone (4) has a cylindrical connecting portion (44), the inner sidewall of the hollow groove (21) is a circumferential surface, and the inner side of the hollow groove (21) The wall has an internal thread, and the outer peripheral surface of the connecting part (44) has an external thread matched with the internal thread. 7. The stepped positioning pin structure according to claim 4, characterized in that, both the end surface of the rear end (24) of the pin two (2) and the end surface of the pin one (1) have uneven friction layers (5).